Molecular Rydberg state

{
  "id": "MLC-T-CHM-007515",
  "term": "Molecular Rydberg state",
  "field": "Chemistry",
  "definition": "An excited electronic state of a molecule where one electron is promoted to a high-lying orbital, resembling a Rydberg orbital in an atom. These states are characterized by large principal quantum numbers and diffuse electron distributions. The energy levels of molecular Rydberg states often converge to an ionization limit.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "electronic state",
    "ground state",
    "polarizability",
    "valence"
  ],
  "references": [
    "PAC, 1999, 71, 1919. 'Glossary of terms used in theoretical organic chemistry' on page 1952 (https://doi.org/10.1351/pac199971101919)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/molecular-rydberg-state/"
}